Most cost-efficient AI models ($ per correct answer)
Ranked by USD per correct answer — true intelligence-per-dollar, not just sticker price. A cheap model that needs many retries is not cheap. Cost-per-correct already amortizes the error rate, so it is the honest cost metric for budget-sensitive workloads.
Ranking 82 models across the meo-tested roster · as of 2026-10-18.